1a1b5ec25Sjsg /*-
2a1b5ec25Sjsg * Copyright (c) 2006,2008 Joseph Koshy
3a1b5ec25Sjsg * All rights reserved.
4a1b5ec25Sjsg *
5a1b5ec25Sjsg * Redistribution and use in source and binary forms, with or without
6a1b5ec25Sjsg * modification, are permitted provided that the following conditions
7a1b5ec25Sjsg * are met:
8a1b5ec25Sjsg * 1. Redistributions of source code must retain the above copyright
9a1b5ec25Sjsg * notice, this list of conditions and the following disclaimer.
10a1b5ec25Sjsg * 2. Redistributions in binary form must reproduce the above copyright
11a1b5ec25Sjsg * notice, this list of conditions and the following disclaimer in the
12a1b5ec25Sjsg * documentation and/or other materials provided with the distribution.
13a1b5ec25Sjsg *
14a1b5ec25Sjsg * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15a1b5ec25Sjsg * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16a1b5ec25Sjsg * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17a1b5ec25Sjsg * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18a1b5ec25Sjsg * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19a1b5ec25Sjsg * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20a1b5ec25Sjsg * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21a1b5ec25Sjsg * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22a1b5ec25Sjsg * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23a1b5ec25Sjsg * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24a1b5ec25Sjsg * SUCH DAMAGE.
25a1b5ec25Sjsg */
26a1b5ec25Sjsg
27a1b5ec25Sjsg #include <assert.h>
28a1b5ec25Sjsg #include <gelf.h>
29a1b5ec25Sjsg
30a1b5ec25Sjsg #include "_libelf.h"
31a1b5ec25Sjsg
32*63b93652Sjsg ELFTC_VCSID("$Id: gelf_syminfo.c,v 1.2 2020/05/18 06:46:23 jsg Exp $");
33a1b5ec25Sjsg
34a1b5ec25Sjsg GElf_Syminfo *
gelf_getsyminfo(Elf_Data * ed,int ndx,GElf_Syminfo * dst)35a1b5ec25Sjsg gelf_getsyminfo(Elf_Data *ed, int ndx, GElf_Syminfo *dst)
36a1b5ec25Sjsg {
37a1b5ec25Sjsg int ec;
38a1b5ec25Sjsg Elf *e;
39a1b5ec25Sjsg size_t msz;
40a1b5ec25Sjsg Elf_Scn *scn;
41a1b5ec25Sjsg uint32_t sh_type;
42a1b5ec25Sjsg struct _Libelf_Data *d;
43a1b5ec25Sjsg Elf32_Syminfo *syminfo32;
44a1b5ec25Sjsg Elf64_Syminfo *syminfo64;
45a1b5ec25Sjsg
46a1b5ec25Sjsg d = (struct _Libelf_Data *) ed;
47a1b5ec25Sjsg
48a1b5ec25Sjsg if (d == NULL || ndx < 0 || dst == NULL ||
49a1b5ec25Sjsg (scn = d->d_scn) == NULL ||
50a1b5ec25Sjsg (e = scn->s_elf) == NULL) {
51a1b5ec25Sjsg LIBELF_SET_ERROR(ARGUMENT, 0);
52a1b5ec25Sjsg return (NULL);
53a1b5ec25Sjsg }
54a1b5ec25Sjsg
55a1b5ec25Sjsg ec = e->e_class;
56a1b5ec25Sjsg assert(ec == ELFCLASS32 || ec == ELFCLASS64);
57a1b5ec25Sjsg
58a1b5ec25Sjsg if (ec == ELFCLASS32)
59a1b5ec25Sjsg sh_type = scn->s_shdr.s_shdr32.sh_type;
60a1b5ec25Sjsg else
61a1b5ec25Sjsg sh_type = scn->s_shdr.s_shdr64.sh_type;
62a1b5ec25Sjsg
63a1b5ec25Sjsg if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) {
64a1b5ec25Sjsg LIBELF_SET_ERROR(ARGUMENT, 0);
65a1b5ec25Sjsg return (NULL);
66a1b5ec25Sjsg }
67a1b5ec25Sjsg
68*63b93652Sjsg if ((msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version)) == 0)
69*63b93652Sjsg return (NULL);
70a1b5ec25Sjsg
71a1b5ec25Sjsg assert(ndx >= 0);
72a1b5ec25Sjsg
73a1b5ec25Sjsg if (msz * (size_t) ndx >= d->d_data.d_size) {
74a1b5ec25Sjsg LIBELF_SET_ERROR(ARGUMENT, 0);
75a1b5ec25Sjsg return (NULL);
76a1b5ec25Sjsg }
77a1b5ec25Sjsg
78a1b5ec25Sjsg if (ec == ELFCLASS32) {
79a1b5ec25Sjsg
80a1b5ec25Sjsg syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx;
81a1b5ec25Sjsg
82a1b5ec25Sjsg dst->si_boundto = syminfo32->si_boundto;
83a1b5ec25Sjsg dst->si_flags = syminfo32->si_flags;
84a1b5ec25Sjsg
85a1b5ec25Sjsg } else {
86a1b5ec25Sjsg
87a1b5ec25Sjsg syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx;
88a1b5ec25Sjsg
89a1b5ec25Sjsg *dst = *syminfo64;
90a1b5ec25Sjsg }
91a1b5ec25Sjsg
92a1b5ec25Sjsg return (dst);
93a1b5ec25Sjsg }
94a1b5ec25Sjsg
95a1b5ec25Sjsg int
gelf_update_syminfo(Elf_Data * ed,int ndx,GElf_Syminfo * gs)96a1b5ec25Sjsg gelf_update_syminfo(Elf_Data *ed, int ndx, GElf_Syminfo *gs)
97a1b5ec25Sjsg {
98a1b5ec25Sjsg int ec;
99a1b5ec25Sjsg Elf *e;
100a1b5ec25Sjsg size_t msz;
101a1b5ec25Sjsg Elf_Scn *scn;
102a1b5ec25Sjsg uint32_t sh_type;
103a1b5ec25Sjsg struct _Libelf_Data *d;
104a1b5ec25Sjsg Elf32_Syminfo *syminfo32;
105a1b5ec25Sjsg Elf64_Syminfo *syminfo64;
106a1b5ec25Sjsg
107a1b5ec25Sjsg d = (struct _Libelf_Data *) ed;
108a1b5ec25Sjsg
109a1b5ec25Sjsg if (d == NULL || ndx < 0 || gs == NULL ||
110a1b5ec25Sjsg (scn = d->d_scn) == NULL ||
111a1b5ec25Sjsg (e = scn->s_elf) == NULL) {
112a1b5ec25Sjsg LIBELF_SET_ERROR(ARGUMENT, 0);
113a1b5ec25Sjsg return (0);
114a1b5ec25Sjsg }
115a1b5ec25Sjsg
116a1b5ec25Sjsg ec = e->e_class;
117a1b5ec25Sjsg assert(ec == ELFCLASS32 || ec == ELFCLASS64);
118a1b5ec25Sjsg
119a1b5ec25Sjsg if (ec == ELFCLASS32)
120a1b5ec25Sjsg sh_type = scn->s_shdr.s_shdr32.sh_type;
121a1b5ec25Sjsg else
122a1b5ec25Sjsg sh_type = scn->s_shdr.s_shdr64.sh_type;
123a1b5ec25Sjsg
124a1b5ec25Sjsg if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) {
125a1b5ec25Sjsg LIBELF_SET_ERROR(ARGUMENT, 0);
126a1b5ec25Sjsg return (0);
127a1b5ec25Sjsg }
128a1b5ec25Sjsg
129*63b93652Sjsg if ((msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version)) == 0)
130*63b93652Sjsg return (0);
131a1b5ec25Sjsg
132a1b5ec25Sjsg assert(ndx >= 0);
133a1b5ec25Sjsg
134a1b5ec25Sjsg if (msz * (size_t) ndx >= d->d_data.d_size) {
135a1b5ec25Sjsg LIBELF_SET_ERROR(ARGUMENT, 0);
136a1b5ec25Sjsg return (0);
137a1b5ec25Sjsg }
138a1b5ec25Sjsg
139a1b5ec25Sjsg if (ec == ELFCLASS32) {
140a1b5ec25Sjsg syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx;
141a1b5ec25Sjsg
142a1b5ec25Sjsg syminfo32->si_boundto = gs->si_boundto;
143a1b5ec25Sjsg syminfo32->si_flags = gs->si_flags;
144a1b5ec25Sjsg
145a1b5ec25Sjsg } else {
146a1b5ec25Sjsg syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx;
147a1b5ec25Sjsg
148a1b5ec25Sjsg *syminfo64 = *gs;
149a1b5ec25Sjsg }
150a1b5ec25Sjsg
151a1b5ec25Sjsg return (1);
152a1b5ec25Sjsg }
153